Environmental Protection Agency (EPA) MVAC Certification

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Get ready for the EPA MVAC Certification exam with our study materials covering flashcards and multiple choice questions, each offering hints and explanations. Prepare thoroughly for your certification!

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The Montreal Protocol was signed in what year by 23 countries, including the USA?

1985
1987
1990
1992

The correct answer is: 1987

The Montreal Protocol was signed in 1987 as a significant international treaty aimed at protecting the ozone layer by phasing out the production and consumption of numerous substances known to deplete it, particularly chlorofluorocarbons (CFCs) and other ozone-depleting chemicals. This landmark agreement was reached during a time when scientific evidence was mounting regarding the harmful effects of these substances on the ozone layer, which shields the Earth from harmful ultraviolet radiation. Involving 23 countries initially, including the United States, the protocol established a framework for global cooperation to mitigate environmental damage, and it has since been ratified by nearly all countries in the world. The success of the Montreal Protocol in reducing ozone-depleting substances has led to a gradual recovery of the ozone layer, showcasing the efficacy of international environmental agreements. The other provided dates do not correspond to the signing of the Montreal Protocol, as it was indeed in 1987 that this critical step was taken.